Batch convert DVD videos (with VIDEO_TS folder) to MKV using HandBrake CLI

handbrake.sh

#!/bin/bash
###########
# 
# Batch convert DVD Videos with HandBrake CLI
# The script will recursively look for "VIDEO_TS" folders and parse them
# 
# Read this to understand:
# https://mattgadient.com/2013/06/12/a-best-settings-guide-for-handbrake-0-9-9/
# http://www.thewebernets.com/2015/02/28/easiest-best-optimal-settings-for-handbrake-dvd-video-conversion-on-mac-windows-and-linux/
#

for i in `find . -type d -iname "video_ts"`
do
	echo "$i"
	# this is a bit dirty hack to remove VIDEO_TS part, and later leave only folder (movie) name
	name=${i%/*}  
	name=${name#*/}
	name=${name#*/}
	name=${name#*/}
	name=${name#*/}
	# end of dirty hack

	########### OPTIONS EXPLAINED
	#
	### VIDEO OPTIONS
	# To understand the quality (RF) setting:
	# https://mattgadient.com/2013/06/20/comparing-x264-rf-settings-in-handbrake-examples/
	OP="-e x264 -q 20"
	# The encoder-preset time vs size is explained here: 
	# https://mattgadient.com/2014/01/06/handbrake-rf-slower-speeds-craziness/
	#
	# I recommend running 'ultrafast' and if you like the output, run it again with 'veryslow'
	# OP="$OP --encoder-preset veryslow"
	OP="$OP --encoder-preset ultrafast"
	OP="$OP --encoder-tune film"
	OP="$OP --encoder-profile high"
	# Level setting depends somewhat on resolution setting
	# https://en.wikipedia.org/wiki/H.264/MPEG-4_AVC#Levels
	OP="$OP --encoder-level 3.1"
	#
	### PICTURE OPTIONS 
	# Those settings resulted for most accurate output picture (close to original)
	OP="$OP --keep-display-aspect"
	OP="$OP --loose-anamorphic"
	#
	### AUDIO OPTIONS
	# All tracks, ac3 is good enough for me
	OP="$OP --all-audio"
	OP="$OP --aencoder copy:ac3" 
	#
	### SUBTITLE OPTIONS
	# I like to keep subtitles
	OP="$OP --all-subtitles"

	### Show time!
	HandBrakeCLI -i "$i" --main-feature -o "$name.mp4" "$OP"
done